Spindle-bearing.



Patented July 29, I962.

' J KILBURN SPINDLE BEARING.

(Application filed Feb. 27, 1897.)

2 Sheets-Sheet 1.

(No Model.)

- INVENTUR WITNEEIEE'E No. 705,347. 7 Patentefl July 29, I902.

.1. KILBURN.

SPINDLE BEARING.

(Applicanon filed Feb. 27, 1897.) (No Model.) 2 Sheets-Sheet 2.

i y \I 1y 1 Hi5 lE 7 I M &

z INVENTEJR WITNEEE'JES Q W mm UNITED STATES.

PATENT OFFICE.

JOHN KILBURN, OF BELMONT, MASSACHUSETTS, ASSIGNOR TO THE SAWYER SPINDLE COMPANY, OF MAINE, A CORPORATION OF MAINE.

QSPINDLE-BEARINIG.

SPECIFICATION forming part of Letters Patent No. 705,847, dated July 29, 1902.

Application filed February 27, 1897. Serial No. 625,286. (No model.)

To (all whmn it may concern: 7

Be it known that I, JOHN KILBURN, a citizen of the United States, residing at Belmont, in the county of Middlesex and Stateof Massachusetts, have invented certain new and useful Improvements in Spindle-Bearings; and I do hereby declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same.

As spindles of the self -center,ing or top type are commonly constructed they are provided with a tapered pintle, and the spindlebearing comprises a bolster or tubular hearing Within which the spindle-pintle rotates and the bore of which is correspondingly tapered.

The object of the present invention is to provide an improved means for'adjusting the spindle-pintle in the bolster to take up the wear of parts and prevent undue friction and the binding of the spindle-pintle in the bolster.

To the above end the present invention con-' sists of the devices and combination of devices hereinafter more specifically set forth and claimed.

The present invention is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section through a spindle-bearing involving the present invention, the lower portion of the spindle, in-

cluding the spindle-pintle, being shown'fin elevation. Fig. 2 is a sectional View ofthe lower portion of a spindle-bearing, showlng the lower portion of the spindle-pintle in elevation and illustrating a modified form of my invention. Figs. 3 and 4 are transverse sections on lines a; w and y 'y, Fig. 2. Fig. 5 is a sectional view of the lower portion of a spindle-bearing, illustrating another modification of the present invention; and Figs. 6 and 7 are similar views illustrating still further modifications.

Similar letters of reference are applied to like parts in the several'views.

In the drawings, A represents the lower portion of a spindle having the usual tapered pintle a and preferably the usual sleevewhirl a. B represents the bolster, the bore of which is tapered to fit the spindle-pintle a and which is provided with the usual wicking or other elastic packing b. O represents the spindle-rail, and D the bolster-case, all of which parts except as hereinafter specified may be and conveniently are of the usual construction and in themselves form no part of the present invention.

Referring more particularly to the form of my invention illustrated in Fig. 1 of the accompanying drawings, I have shown as ,formed in the base of the bolster B a polygonal aperture 19', substantially in line with the bore of the bolster B. l have also provided a step-pintle, the lower end of which rests upon an adjustable support at in the base of the bolster-case D and the upper portion of which is projected into the aperture b and forms the step upon which the spindle-pintle a rests. The adjustable support d, as shown,

consists of a threaded bolt, whichengages a correspondingly-threaded aperture d in the base of the bolster-case D. The upper portion d of the aperture d is preferably contracted to a slightly-greater diameter in section than the pintle F. The lower portion f of the pin tle F is polygonal in section and loosely engages a correspondingly-shapedaperture d in the adjustable support d. The upper portion f of the pintle F is also polygonal in section and loosely engages the aperture b.

The intermediate portion of pintle F is prefferably cylindrical, so that it is free to rotate and also reciprocate in its bearings d in the base of the bolster-case D. H represents a bolster-support, which in said Fig. l is shown as a sleeve or tube loosely surrounding the -step-pintle F and resting upon the base of the bolster-case D, the bolster B resting upon the top thereof., As shown in Fig. 1, the'pintle F is restrained from rotation by engagement with the aperture d in its adjustable support (1 and by engagement with the aperture b restrains the bolster B from rotation,

and the arrangement is such that the bolster b in the base of the bolster is circular in section and of sufficient diameter to allow the pintle F to turn freely therein.

I have also provided modified means of supporting the bolster D and restraining it from rotation, such means consisting of what I herein have termed a rocker-washer H, in the center of which is a polygonal aperture h, which loosely engages the pintle F and is held from rotation thereby, without, however, interfering with its vertical movement. In the support H is a radial slot M, which is engaged by a vertical pin b projected from the base of bolster B. I also find it convenient to provide in this construction a lateral projection, conveniently a pin f, driven through the step-pintle F, and which when said step-pintle is withdrawn from the bolster-case D takes-under thesupport H, so that the same can be removed therewith. I also form the upper portion 01 less contracted than in the first-described construction, so that the pin f can pass freely through the same, the pintle F being suificiently steadied by its bearings in the support H. In its features not hereinbefore noted the construction shown in Fig. 2 is substantially similar to that illustrated in Fig. 1. In Fig. 5 the aperture 0Z is enlarged in order to provide for a freer lateral movement of the step-pintle F.

As shown in Fig. 6, the step-pintle F is polygonal in section at its upper and lower portions, and the upper portion engages loosely in the correspondingly-shaped aperture 1) in the base of the bolster B, its lower portion engaging a similar aperture C1 in the base of the bolster-case D, the arrangement being such that the pintle F is restrained from rotation by its engagement with the bolstercase and restrains the bolster from rotation by its engagement therewith.

An important difference between the construction illustrated in Fig. 6 and those heretofore described is in the arrangement of the adjustable support for the step-pintlc F As shown in said figure, said support comprises a pin n, upon the upper end of which the pintle F rests and which is fitted in a vertical aperture (1 in the base of the bolster-case D with what I have herein termed a forcing fit. I may say in this connection that I use the term forcing fit as meaninga fit which is as tight as practical and which will still permit a reciprocation of the pin n when sufficient force is applied thereto, the object of this feature of the construction being to obviate as far as practicable a leakage of oil through the aperture 0 The lower end of the pin n rests upon a threaded bolt d, which engages correspondingly-threaded bearings cl in the base of the bolster-case D, the aperture forming the bearings d being preferably of greater diameter than the aperture d to which the pin it is fitted.

The construction shown in Fig. 6 is in other respects substantially the same as that which is illustrated in Fig. 1 and has hereinbefore been fully described. I may say, however, in this connection that after the pin it has been raised to raise the spindle-pintle a, as hereinafter described, it may be lowered by removing the bolster B from its case D and inserting in the caseD a tap-rod, the lower end of which is brought in contact with the pin n and the tap-rod struck with a hammer or other convenient instrument.

As shown in Fig. 7, the bolsterB rests upon the pins 01 fixed in the walls of the bolstercase D and which engage vertical slots b in the base of the bolster B and restrains it from rotation. The aperture b in the base of the bolster B is circular in section as is also the upper portion f of the step-pintle F As shown, the portion of the step-pintle F which engages the aperture 01 is polygonal in section and loosely engages the aperture c1 which is of a similar shape in section,therebyrestraining the step-pintle F from rotation with the spindle. In this construction the step-pintle F merely rests upon the top of its support d which is not provided with any aperture to engage the same. The construction is in other respects not hereinbefore noted'substantially the same as that before described as illustrated in Fig. 1. In each of the constructions illustrated the adjustable support for the step-pintle may be conveniently controlled by the polygonal head 19 on the bolt projecting from the base of the bolster-case D.

I may say that where the term polygonal is used herein it is meant to include as a well-known equivalent any shape other than round.

In using my present invention in any of the forms herein illustrated when the spindlepintle a has worn away or worn into the step sufficiently to cause the spindle to fall in the bolster, and thus tend to bind or turn with too great friction therein, the operator by means of the polygonal head 10 turns the bolt, which projects from the base of case D, and thus raises the step-pintle, thus raising the spindle-pintle in its bearings in the bolster until the friction is sufficiently diminished and all tendency to bind removed.

I am aware of the state of the art as shown in patent to Northrup, No. 503,060, August 8, 1893, also patent to Draper, No. 525,453, September 4, 1894, also patent to Carroll, No. 528,362, October 30, 1894, and claim nothing shown therein; but

I do claim as my invention and desire to secure by Letters Patent of the United States- 1. The combination with a bolster-case provided with an aperture in its base, of a tapered spindle, a bolster forming a bearing for the spindle located within the case, said bolster being loosely supported in the case and provided with an interiorly-smooth aperture in its bottom, a step-pintle for the spindle located in the aperture in the bottom of the bolster-case and projected through the aperture in the bottom of the bolster and free to have direct vertical movements in said apertures, and a support for the step-pintle independent of the support for the bolster adj ustable through the base of the bolster-case, substantially as described.

2. The combination with a bolster loosely supported in the bolster-case and bolster having apertures in their bases of a step-pin'tle free to tip laterally in all directions projecting into the aperture in the base of the bolster, and a support for said step-pintle independent of the support for the bolster ad justable through the base of the bolster-case, substantially as described.

3. The combination with the bolster-case and bolster, of a step-pintle projected into the bolster, and a tubular support for the bolster within the bolster-case loosely surrounding the step-pintle, substantially as described.

4. The combination with the bolster-case and bolster, of a step-pintle projected into the bolster, and a tubular support for the bolster comprising a rocker-Washer having a convex face loosely surrounding the steppintle, substantially as described.

5. The combination with a bolster-case and bolster, of a step-pintle projected into the bolster, a tubular support for the bolster loosely surrounding the step-pintle and a projection on the step-pintle arranged to engage the tubular support to remove said support from the bolster-case, substantially as described.

6. The combination with the bolster-case and bolster, having a circular aperture in its base, a step-pintle projected into said aperture and free to rotate therein, a bolster-support loosely surrounding said step-pintle and restrained from rotation thereby, and connections between the bolster andsaid support, whereby the bolster is restrained from rotation, substantially as described.

7. The combination with the bolster-case and bolster provided with a polygonal aperture in its base, of a step-pintle polygonal in section adjacent its opposite ends, an adjustable support for the step-pintle havinga poly onal aperture therein, said step-pintle engaging at its opposite ends the apertures in the bolster and the adjustable support, substantially as described.

8. In a spindle-bearing, the combination with a bolster-case and bolster,of a step-pintle having a polygonal end engaging a polygonal bearing in the bolster 'and fitted for a longitudinal movement in the bottom of the bolster-case, means projecting from the bolstercase engaging the step-pintle to turn the same, and an intermediate annular bearing between the lower end of the bolster and the bolster-case, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN KILBURN.

Witnesses:

BENJAMIN PHILLIPS, A. O. ORNE. 

